The electrical properties of chemically obtained barium titanate improved by attrition milling

• Published in: Journal of sol-gel science and technology Vol. 67; no. 2; pp. 267 - 272
• Main Authors: Vijatović Petrović, M. M., Bobić, J. D., Uršič, H., Banys, J., Stojanović, B. D.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.08.2013; Springer; Springer Nature B.V
• Subjects: Agglomeration; Barium; Barium titanates; Ceramic powders; Ceramics; Chemistry; Chemistry and Materials Science; Colloidal gels. Colloidal sols; Colloidal state and disperse state; Composites; Curie temperature; Dielectric loss; Dielectrics; Electrical properties; Exact sciences and technology; Ferroelectric materials; Ferroelectricity; General and physical chemistry; Glass; Grinding mills; Hysteresis loops; Inorganic Chemistry; Materials Science; Nanostructure; Nanotechnology; Natural Materials; Optical and Electronic Materials; Organic chemistry; Original Paper; Permittivity; Phase transitions; Piezoelectricity; Prepolymers; Temperature dependence; Piezoelectric properties; Agglomeration; Barium titanate; Ferroelectric properties; Dielectric properties; Electrical properties; Sol gel process; Barium titanates
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-013-3075-9

Barium titanate ceramics were prepared using the nanopowder resulting from a polymeric precursor method, a type of modified Pechini process. The obtained nanopowder was observed to agglomerate and in order to de-agglomerate the powder and enhance the properties of the barium titanate the material was attrition milled. The impact of this attrition milling on the electrical properties of the barium titanate was analysed. The temperature dependence of the relative dielectric permittivity showed three structural phase transitions that are characteristic for ferroelectric barium titanate ceramics. The relative dielectric permittivity at the Curie temperature was higher for the attrition-treated sample than for the non-treated barium titanate. The dielectric losses were below 0.04 in both barium titanate ceramics. The grain and grain-boundary contributions to the total resistivity were observed using impedance analyses for both ceramics. A well-defined ferroelectric hysteresis loop and piezoelectric coefficient d 33  = 150 pC/N were obtained for the ceramics prepared from the de-agglomerated powder. In this way we were able to demonstrate that by attrition milling of chemically obtained powders the ferroelectric and piezoelectric properties of the ceramics could be enhanced.